Detachable tread for automobile-tires.



T. M. DAVBY. DETAGHABLE TREAD POR AUTOMOBILE TIRES.

APPLICATION FILED FEBJG, 1907. V

Patented 0611.26, 1909.

inventor.

y 1 QJJ'i/H 7m Attorney.

@Webm m L@ Q fw an strains "sanar orare TOWNSHEND M. DAVIGY, OF BUFEALO, NEW YORK.

DETACHABLE TREAD EGR AUTOMO'BXLE-TRES.

To4 all whom 'it may concern:

Be it known that I, ToWNsHnND lvl. Davey, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented a certain new and useful Improvement in Detachable Trends for Automobile-Tires, of which the following is a specification.

This invention relates to an improved detachable tread for automobile tires and the like and the principal object of the invention is to provide a device of this class that may be very quickly attached toor detached from a tire.

A preferred adaptationof the invention is shown in the accompanying drawings, in Whicln- Figure l is a side View of an automobile wheel and tire equipped With the improved detachable tread. Fig. 2 is an enlarged trans verse section through an automobile tire showing the improved detachable tread in place thereon. Fig. 8 is an enlarged frag mentary detachable inside view ot the improved detachable tread. Fig. 4 is an enlarged section on line a a, F ig. 3. Fig. 5 is a similar View showing the spring extended. Fig. 6 is an enlarged section on line b b, Fig. 3. Fig. 7 is a detached fragmentary view of one of the springs.

The adaptation of the invention shown is in the form of an endless band consisting of a series of sections l of tough iiexible inaterial such as raw hide or chrome tanned leather, 'and coil springs 2 elastically connectin the sections together at their corners. ach of the sections is in form nearly square with each of its edges concaved so that its transverse end edges Will iit snugiy to the tire surface -as shown at 3 in Fig. l, and its longitudinal side edges Will curve in correspondence with the rim of the Wheel as shown at 4 in Fig. l.

The coil springs 2, which constitute longitudinal contractile members are formed oi spring Wire of any suitable metal that possesses the necessary qualities. rlhe coil springs 2, are provided With end' loops 5 through which rivets 6, are fitted to Ifasten the ends ofthe springs tothe corners of the flexible sections. The springs are limited `in their expansion by means which are not elastic in the direction of their length but is preferably possessed of flexibility to per- -mit bending and preferably consists of strong thongs .7 which extend through the Specncatien ofletters Patent. Patented Got. 26, T1909. Application let February 16, 1907. y

Serial No. $527,819.

coil springs and are fastened to the corners of the section lby the same rivets G, that se cure the spring ends thereto. The thongs l also extend along the longitudinal side edges of the sections to strengthen the same against longitudinal strain and thus extend entirely around the circumference of a Wheel When' the` tread is tit-ted over a tire on said wheel.

rl`lie limiting action of the thongs 'Z' With respect tothe expansion of the springs is illustrated in Figs. t and 5, the spring being in contracted position in Fig. i With thethong loose and in expanded position in Fig. With the thong taut. rihe object of the thongs is to prevent breakage of `the springs from excessive expansion and also-to additionally strengthen the device coinpletely around both oit its side edges. The

thongs are formed of raw hide leather or. other. suitable material., The central por-- tions of the sections may be provided with a series of rivets 8, having thick heads 9,.Which project on the outer surface of the sections to provide means for securing a better To prevent those portions of the `rivets on the inner surface of the section from in anyway injuring the tire surface, a lining l0, covering the portionl may be attached by rows oi sewing 11, to

the section as shown in Figs. 3 and (i. The lining 10,-niay be made of raw hide or oi" anyT other suitable material possessing the requisite qualities of strength, toughness and iiexibility.

l'n Figs. l and 2 this improved tread is illustrated as applied in position upon a pneumatic tire l2 of the clench'er type which Lis attached to alrini 18 fitted on a telly lli.

In Fig. l, a Wheel of Well known construction is shown composed of a -hub i5, spokes 16 and the .telly 14, and rim 13 shown in Fig. 2. The device is fitted in place by simply springing it over a tire that'is by enlarging it suiliciently circumiterentially by extending or lengthening the coil springs to permit it to pass over the tire, and it is held in place by the constrictive actionof the springs only.

lil@

'W hen fitted in place on a pneumatic tire,

the device is located as shown in Figs. i and 2, with the sections bent around, the surface of the tire and the coil springs and thongs extending around the'opposite sides of the tire and preferably just above the rim of the Wheel. extend transversely of the tire, 'and are located at intervals and owing to .their pe-" lt is to be noted that the sections' .culiai eoneeved .term and the yielding man ner in which they are, tensioned upon the tire they Conform perfectly to the rounding configuration of the tire and. their trans verse edges fit closely to the ontei1 surface and in e large measure prevent the interposition of dirt, stones, eley and othezl sub stances between the sections and the tire surface, l v

The great advantage of this device aside from the great strength and simplicity of .its construction resides in the ease and quickness with which it can loe attached to or detached from al Wheel. This is due to the fact that it can be expanded. circumferentially which permits it to be enlarofed sufeiently to be sprung on or off a tire. As the tread is yieldingly held in place upon the tire, it will automatically accommodate itself to the change of contour of a pneumatie automobile tire ove!1 which it is fittedl and thus fit snugly against the smfeee under all conditions.

1 The device not only7 serves to prevent skidding on slippery or Wet pavements but also actually acts as a protector for the tire itself relieving and preventing Wear to an appreciable extent. I claim as my invention.

l. A device of theelass described in the form of an endless band composed of sections of flexible material, eoil springs conneeted at their ends to the corners of said sections and thongs for limiting the expansion of said springs.

2. A device of the class ydescribed in theformf of an endless band composed of sections of flexible material, coil springs and' endless thongs extending entirely around the sides of the band and through the coil springs, and rivets at each corner of the sections for fastening the ends of the'coil sptings and the thongs to the sections, substantially as set forth.

TOWNSHEND M. DAVEY. llitnesses L. M. SANosTER, Gnome A. NEUBAUER. 

